#Open source pdf editor portable

Free PDF Editorsįree PDF editors are hard to come by and are mainly limited to free trials of applications being sold. There are more than 250 million PDF documents present on the internet, which is a clear indicator of its wide application and use. PDF is perhaps the most popular document format in use today. Restrictions can also be imposed even after the document is open. PDF document creators can set a password for opening the file. PDF files can be encrypted or authenticated via digital signature. PDF documents protect the original file information inclusive of text, images, drawing, original graphics, 3D and other elements. There are a large number of software vendors that produce plug-in, creation and support tools. The most important feature of the PDF file format is that it can be viewed and printed on literally any platform inclusive of the most popular ones such as Microsoft Windows and Mac OS, and even Unix and mobile platforms.

It specifies the number of objects in the table, object point of origin and its byte length. The xref table has all the indicators to the objects in the file. The body holds all the object data such as fonts, words, images and so on.

The header consists of one line of code that categorizes the version of PDF. The common structure of a PDF file comprises of the following code modules: header, body, xref table and trailer. PDF file structureĪ PDF document comprises of eight types of objects. It was initially a proprietary file format however PDF has been available as an open format from 2008 and adheres to the ISO/IEC 3200-1:2008 standard. It was first introduced in 1993 and is capable of capturing content and formatting information from any document irrespective of the hardware and operating system platform.

#Open source pdf editor portable

Portable Document Format (PDF) is a type of file format developed by Adobe Systems.